[vtkusers] Color flickering

[Ken Martin]

If they are in two different mappers and you are using the new OpenGL2
backend, then you can solve it in VTK by calling

SetResolveCoincidentTopologyToPolygonOffset();
SetRelativeCoincidentTopologyPolygonOffsetParameters(-2,-2);

on one of the mappers.  If they are in the same mapper then, you cannot
solve it in VTK as the two polygons occupy exactly the same space, but due
to driver specific rendering implementations there may be some differences
frame to frame in what pixels end up on top.

Hope that helps
Ken





On Fri, Oct 7, 2016 at 7:38 AM, Ruben van Staden <rubenvanstaden at gmail.com>
wrote:

> Dear Readers
>
> I have two overlapping polyhedrons that each have a different color.
> When I plot them using Paraview, the part of the structure that overlaps
> starts flickering as I rotate the structure. Almost like the program is
> confused
> to what coloring to add to that part, since they overlap.
>
> Is there a way to solve this, somehow using VKT, or will I have to
> do polyhedron boolean operations?
>
> Regards
> Ruben
>
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-- 
Ken Martin PhD
Chairman & CFO
Kitware Inc.
28 Corporate Drive
Clifton Park NY 12065
518 371 3971

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